/* roulang page: index */
:root {
            --primary: #0B2545;
            --primary-light: #123B6D;
            --neon-cyan: #00D9FF;
            --neon-purple: #7C5CFC;
            --bg-light: #F4F8FC;
            --card-bg: #FFFFFF;
            --accent: #F5A623;
            --accent-hover: #E08F0A;
            --text-primary: #1E2A3B;
            --text-secondary: #51617A;
            --border-color: #E3EAF2;
            --success: #10B981;
            --error: #E5484D;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 8px 30px rgba(11, 37, 69, 0.08);
            --shadow-hover: 0 12px 36px rgba(11, 37, 69, 0.14);
            --transition: 0.3s ease;
            --font-sans: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "DIN Alternate", "Roboto", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-light);
            color: var(--text-primary);
            font-size: 16px;
            line-height: 1.75;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: color var(--transition);
        }
        a:hover {
            color: #00A0C4;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        ::selection {
            background: var(--neon-cyan);
            color: var(--primary);
        }
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--neon-cyan);
            outline-offset: 2px;
            box-shadow: none;
        }
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            transition: all var(--transition);
            padding: 12px 28px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        .btn:hover,
        .btn:focus {
            transform: translateY(-2px);
        }
        .btn:active {
            transform: translateY(0);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            border: 1px solid var(--accent);
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
        }
        .btn-accent:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            color: #fff;
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.35);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.35);
        }
        .btn-outline-light:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            background: transparent;
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid #C5D3E3;
        }
        .btn-outline:hover {
            border-color: var(--neon-cyan);
            color: #0088AA;
            background: transparent;
        }
        .text-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .text-link i {
            transition: transform var(--transition);
        }
        .text-link:hover {
            color: #00A0C4;
        }
        .text-link:hover i {
            transform: translateX(4px);
        }
        .section {
            padding: 96px 0;
        }
        .section-light {
            background: var(--bg-light);
        }
        .section-white {
            background: #fff;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            padding-left: 20px;
            border-left: 4px solid var(--neon-cyan);
            border-radius: 2px;
            margin-bottom: 12px;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 560px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
        }
        .site-header .navbar {
            background: var(--primary);
            min-height: 72px;
            padding-top: 0;
            padding-bottom: 0;
            position: relative;
        }
        .site-header .navbar::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0) 0%, var(--neon-cyan) 50%, rgba(0, 217, 255, 0) 100%);
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding-top: 0;
            padding-bottom: 0;
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            background: var(--neon-cyan);
            color: var(--primary);
            font-weight: 800;
            font-size: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-family: var(--font-num);
            box-shadow: 0 0 12px rgba(0, 217, 255, 0.35);
        }
        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.2;
            font-family: var(--font-num);
        }
        .brand-sub {
            font-size: 13px;
            color: #A8B8D0;
            font-weight: 400;
            margin-left: 6px;
        }
        .navbar-nav {
            gap: 6px;
        }
        .navbar-nav .nav-link {
            color: #A8B8D0;
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 6px;
            position: relative;
            transition: color var(--transition);
        }
        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 1px;
            transition: width var(--transition);
        }
        .navbar-nav .nav-link:hover {
            color: #fff;
        }
        .navbar-nav .nav-link:hover::after {
            width: 70%;
        }
        .navbar-nav .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .navbar-nav .nav-link.active::after {
            width: 70%;
            box-shadow: 0 2px 8px rgba(0, 217, 255, 0.5);
        }
        .btn-nav-cta {
            background: var(--accent);
            border: none;
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 8px;
            margin-left: 16px;
            box-shadow: 0 2px 12px rgba(245, 166, 35, 0.25);
            transition: all var(--transition);
        }
        .btn-nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 18px rgba(245, 166, 35, 0.35);
        }
        .navbar-toggler {
            border-color: rgba(255, 255, 255, 0.2);
            padding: 4px 8px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(0, 217, 255, 0.9)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        @media (max-width: 991px) {
            .site-header .navbar {
                min-height: 60px;
            }
            .navbar-collapse {
                background: var(--primary);
                padding-bottom: 20px;
                border-bottom: 1px solid rgba(0, 217, 255, 0.2);
            }
            .navbar-nav {
                padding-top: 12px;
            }
            .navbar-nav .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }
            .navbar-nav .nav-link::after {
                display: none;
            }
            .btn-nav-cta {
                margin-left: 16px;
                margin-top: 12px;
            }
        }

        /* ===== Hero ===== */
        .hero {
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
            padding: 80px 0;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--primary);
            opacity: 0.75;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-title {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.25;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }
        .hero-subtitle {
            font-size: 17px;
            line-height: 1.8;
            color: #C7D4E6;
            margin-bottom: 32px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            gap: 16px;
            margin-bottom: 32px;
            flex-wrap: wrap;
        }
        .hero-trust {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #8FA3BF;
        }
        .hero-trust span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-trust i {
            color: var(--neon-cyan);
            font-size: 14px;
        }
        .hero-panel {
            background: rgba(18, 59, 109, 0.6);
            border: 1px solid rgba(0, 217, 255, 0.2);
            border-radius: 20px;
            padding: 32px 28px;
            backdrop-filter: blur(4px);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
            max-width: 420px;
            margin-left: auto;
        }
        .panel-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }
        .panel-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
        }
        .panel-live {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--neon-cyan);
        }
        .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--neon-cyan);
            animation: pulse 2s infinite;
        }
        @keyframes pulse {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.4);
            }
            50% {
                opacity: 0.7;
                box-shadow: 0 0 0 6px rgba(0, 217, 255, 0);
            }
        }
        .panel-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-bottom: 24px;
        }
        .panel-stat {
            background: rgba(255, 255, 255, 0.06);
            border-radius: 12px;
            padding: 16px 12px;
            text-align: center;
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .panel-stat .stat-num {
            display: block;
            font-family: var(--font-num);
            font-size: 28px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            margin-bottom: 4px;
        }
        .panel-stat .stat-label {
            font-size: 12px;
            color: #A8B8D0;
        }
        .panel-line {
            margin-bottom: 20px;
        }
        .line-track {
            height: 4px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 2px;
            overflow: hidden;
            position: relative;
        }
        .line-bar {
            position: absolute;
            left: 0;
            top: 0;
            height: 100%;
            width: 72%;
            background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
            border-radius: 2px;
        }
        .panel-status {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
            color: #C7D4E6;
        }
        .panel-status i {
            color: var(--success);
            font-size: 16px;
        }
        @media (max-width: 991px) {
            .hero {
                padding: 60px 0;
                min-height: 0;
            }
            .hero-title {
                font-size: 34px;
            }
            .hero-panel {
                margin: 40px auto 0;
                max-width: 100%;
            }
        }
        @media (max-width: 575px) {
            .hero-title {
                font-size: 28px;
            }
            .hero-actions {
                flex-direction: column;
            }
            .hero-actions .btn {
                width: 100%;
            }
            .panel-stats {
                gap: 10px;
            }
            .panel-stat {
                padding: 12px 8px;
            }
            .panel-stat .stat-num {
                font-size: 22px;
            }
        }

        /* ===== Services ===== */
        .services-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
        }
        .service-card-main {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 36px 32px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(227, 234, 242, 0.6);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .service-card-main::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--neon-cyan);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .service-card-main:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .service-card-main:hover::before {
            opacity: 1;
        }
        .service-card-sub {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px 28px;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(227, 234, 242, 0.6);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .service-card-sub::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--neon-cyan);
            opacity: 0;
            transition: opacity var(--transition);
        }
        .service-card-sub:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .service-card-sub:hover::before {
            opacity: 1;
        }
        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(0, 217, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
        }
        .service-icon i {
            font-size: 22px;
            color: var(--neon-cyan);
            stroke-width: 2;
        }
        .service-card-main h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 14px;
        }
        .service-card-sub h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .service-card-main p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .service-card-sub p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .service-side {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        @media (max-width: 991px) {
            .services-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Data Strip ===== */
        .data-strip {
            background: var(--primary);
            padding: 64px 0;
            position: relative;
        }
        .data-strip::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 217, 255, 0.6), transparent);
        }
        .data-strip .container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }
        .data-item {
            text-align: center;
            padding: 12px 0;
        }
        .data-number {
            font-family: var(--font-num);
            font-size: 42px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
            margin-bottom: 8px;
            position: relative;
            display: inline-block;
        }
        .data-number::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 50%;
            transform: translateX(-50%);
            width: 32px;
            height: 1px;
            background: rgba(0, 217, 255, 0.6);
        }
        .data-label {
            font-size: 14px;
            color: #A8B8D0;
            margin-top: 16px;
        }
        @media (max-width: 767px) {
            .data-strip .container {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
            .data-number {
                font-size: 32px;
            }
        }

        /* ===== Cases ===== */
        .case-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding-bottom: 16px;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
        }
        .case-scroll::-webkit-scrollbar {
            height: 6px;
        }
        .case-scroll::-webkit-scrollbar-track {
            background: #E3EAF2;
            border-radius: 3px;
        }
        .case-scroll::-webkit-scrollbar-thumb {
            background: var(--neon-cyan);
            border-radius: 3px;
        }
        .case-card {
            flex: 0 0 360px;
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            scroll-snap-align: start;
            border: 1px solid rgba(227, 234, 242, 0.6);
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .case-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .case-cover {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .case-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .case-card:hover .case-cover img {
            transform: scale(1.04);
        }
        .case-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(11, 37, 69, 0.85);
            color: var(--neon-cyan);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            border: 1px solid rgba(0, 217, 255, 0.3);
        }
        .case-body {
            padding: 24px;
        }
        .case-body h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .case-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        @media (max-width: 575px) {
            .case-card {
                flex-basis: 280px;
            }
        }

        /* ===== Process ===== */
        .process-section {
            background: var(--bg-light);
        }
        .process-row {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr auto;
            align-items: stretch;
            gap: 32px;
            position: relative;
        }
        .process-step {
            background: #fff;
            border-radius: var(--radius);
            padding: 36px 32px;
            box-shadow: var(--shadow);
            border: 1px solid rgba(227, 234, 242, 0.4);
            position: relative;
            transition: box-shadow var(--transition), transform var(--transition);
        }
        .process-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .step-num {
            font-family: var(--font-num);
            font-size: 48px;
            font-weight: 700;
            color: var(--neon-cyan);
            line-height: 1;
            margin-bottom: 16px;
            opacity: 0.85;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .process-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 8px;
        }
        @media (max-width: 991px) {
            .process-row {
                grid-template-columns: 1fr 1fr;
            }
            .process-cta {
                grid-column: span 2;
                padding: 12px 0;
            }
        }
        @media (max-width: 575px) {
            .process-row {
                grid-template-columns: 1fr;
            }
            .process-cta {
                grid-column: span 1;
            }
            .process-cta .btn {
                width: 100%;
            }
        }

        /* ===== FAQ ===== */
        .faq-wrap {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 12px;
            background: #fff;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--neon-cyan);
        }
        .faq-item .accordion-header {
            background: transparent;
        }
        .faq-item .accordion-button {
            background: transparent;
            color: var(--primary);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            box-shadow: none;
            display: flex;
            align-items: center;
            gap: 16px;
            border: none;
            transition: background var(--transition), color var(--transition);
        }
        .faq-item .accordion-button:not(.collapsed) {
            background: #F0F5FB;
            color: var(--primary);
        }
        .faq-item .accordion-button:focus {
            box-shadow: none;
            outline: 2px solid var(--neon-cyan);
            outline-offset: -2px;
        }
        .faq-num {
            font-family: var(--font-num);
            font-size: 14px;
            font-weight: 600;
            color: var(--neon-cyan);
            min-width: 28px;
        }
        .faq-item .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300D9FF'%3e%3cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3e%3c/svg%3e");
            transition: transform 0.3s ease;
            width: 16px;
            height: 16px;
        }
        .faq-item .accordion-button:not(.collapsed)::after {
            transform: rotate(180deg);
        }
        .faq-item .accordion-body {
            padding: 0 24px 20px 68px;
            background: #F0F5FB;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            border-top: 1px solid rgba(227, 234, 242, 0.6);
        }
        @media (max-width: 575px) {
            .faq-item .accordion-body {
                padding-left: 20px;
                padding-right: 16px;
            }
        }

        /* ===== CMS Section ===== */
        .cms-feature {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            margin-bottom: 24px;
            border: 1px solid rgba(227, 234, 242, 0.4);
            display: flex;
            transition: box-shadow var(--transition);
        }
        .cms-feature:hover {
            box-shadow: var(--shadow-hover);
        }
        .cms-feature-cover {
            flex: 0 0 40%;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .cms-feature-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .cms-feature:hover .cms-feature-cover img {
            transform: scale(1.04);
        }
        .cms-feature-body {
            flex: 1;
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .cms-topline {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }
        .cms-tag,
        .cms-mini-tag {
            display: inline-block;
            background: rgba(0, 217, 255, 0.1);
            color: #0088AA;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 12px;
            border-radius: 20px;
            border: 1px solid rgba(0, 217, 255, 0.2);
        }
        .cms-time {
            font-size: 13px;
            color: var(--text-secondary);
        }
        .cms-feature-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .cms-feature-body h3 a {
            color: var(--primary);
        }
        .cms-feature-body h3 a:hover {
            color: #00A0C4;
        }
        .cms-feature-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .cms-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .cms-row {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 4px 16px rgba(11, 37, 69, 0.06);
            border: 1px solid rgba(227, 234, 242, 0.4);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
        }
        .cms-row:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--neon-cyan);
            transform: translateY(-2px);
        }
        .cms-row-main h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .cms-row-main h4 a {
            color: var(--primary);
        }
        .cms-row-main h4 a:hover {
            color: #00A0C4;
        }
        .cms-row-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .cms-row-arrow {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            transition: background var(--transition), color var(--transition);
            flex-shrink: 0;
        }
        .cms-row:hover .cms-row-arrow {
            background: var(--neon-cyan);
            color: var(--primary);
        }
        .cms-empty {
            background: #fff;
            border-radius: var(--radius);
            border: 1px dashed var(--border-color);
            padding: 60px 24px;
            text-align: center;
            width: 100%;
        }
        .cms-empty-icon {
            font-size: 36px;
            color: var(--neon-cyan);
            margin-bottom: 16px;
        }
        .cms-empty p {
            font-size: 16px;
            color: var(--text-secondary);
        }
        @media (max-width: 767px) {
            .cms-feature {
                flex-direction: column;
            }
            .cms-feature-cover {
                flex: 0 0 100%;
                aspect-ratio: 16/9;
            }
            .cms-feature-body {
                padding: 24px;
            }
            .cms-feature-body h3 {
                font-size: 18px;
            }
        }

        /* ===== CTA Banner ===== */
        .cta-banner {
            background: var(--primary);
            border-radius: 20px;
            padding: 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            left: -60px;
            bottom: -60px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 24px solid rgba(0, 217, 255, 0.15);
            pointer-events: none;
        }
        .cta-banner .cta-text {
            position: relative;
            z-index: 1;
        }
        .cta-banner h3 {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .cta-banner p {
            font-size: 15px;
            color: #A8B8D0;
            margin-bottom: 0;
        }
        .cta-banner .btn {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }
        @media (max-width: 767px) {
            .cta-banner {
                flex-direction: column;
                text-align: center;
                padding: 40px 24px;
            }
            .cta-banner .btn {
                width: 100%;
            }
        }

        /* ===== Footer ===== */
        .page-footer {
            background: var(--primary);
            color: #8FA3BF;
            padding: 64px 0 0;
            position: relative;
        }
        .page-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--neon-cyan), transparent);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .navbar-brand {
            margin-bottom: 16px;
        }
        .footer-desc {
            font-size: 13px;
            line-height: 1.7;
            color: #8FA3BF;
            max-width: 260px;
            margin-bottom: 20px;
        }
        .footer-social {
            display: flex;
            gap: 10px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid #3E5878;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #8FA3BF;
            font-size: 14px;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            transform: translateY(-2px);
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 1px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 13px;
            color: #8FA3BF;
            display: inline-flex;
            align-items: center;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-links a:hover {
            color: #fff;
            padding-left: 8px;
            border-left: 2px solid var(--neon-cyan);
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 13px;
            color: #8FA3BF;
            margin-bottom: 14px;
            line-height: 1.6;
        }
        .footer-contact li i {
            color: var(--neon-cyan);
            font-size: 14px;
            margin-top: 2px;
            flex-shrink: 0;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: #617896;
            margin-bottom: 0;
        }
        @media (max-width: 991px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 575px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }

        /* ===== Scrollbar overall ===== */
        ::-webkit-scrollbar {
            width: 10px;
            height: 10px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: #A8B8D0;
            border-radius: 5px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--neon-cyan);
        }

        /* Responsive tweaks */
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .hero-title {
                font-size: 30px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section-header p {
                font-size: 14px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0B2545;
            --primary-light: #123B6D;
            --neon: #00D9FF;
            --neon-secondary: #7C5CFC;
            --bg: #F4F8FC;
            --card: #FFFFFF;
            --cta: #F5A623;
            --cta-hover: #E08F0A;
            --text: #1E2A3B;
            --text-secondary: #51617A;
            --border: #E3EAF2;
            --success: #10B981;
            --error: #E5484D;
            --radius: 16px;
            --shadow: 0 8px 30px rgba(11, 37, 69, 0.08);
            --shadow-hover: 0 12px 36px rgba(11, 37, 69, 0.14);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: var(--primary);
            transition: all 0.3s ease;
        }
        img {
            max-width: 100%;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 80px 0;
        }
        .section-sm {
            padding: 56px 0;
        }
        .section-lg {
            padding: 96px 0;
        }
        .text-gradient {
            background: linear-gradient(135deg, #00D9FF, #7C5CFC);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-title-left {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            position: relative;
            padding-left: 20px;
            line-height: 1.3;
        }
        .section-title-left::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 28px;
            background: var(--neon);
            border-radius: 3px;
        }
        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 48px;
            max-width: 720px;
            line-height: 1.8;
        }
        .btn-neon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--cta);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 8px;
            border: none;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
            transition: all 0.3s ease;
            cursor: pointer;
            text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
        }
        .btn-neon:hover {
            background: var(--cta-hover);
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.35);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-neon:active {
            transform: translateY(0);
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 28px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.35);
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .btn-outline-light:hover {
            border-color: var(--neon);
            color: var(--neon);
            background: rgba(0, 217, 255, 0.06);
        }
        .btn-outline-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 500;
            padding: 10px 24px;
            border-radius: 8px;
            border: 1px solid #C5D3E3;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .btn-outline-primary:hover {
            border-color: var(--neon);
            color: #0088AA;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            transition: all 0.3s ease;
        }
        .text-link i {
            transition: transform 0.3s ease;
        }
        .text-link:hover {
            color: #00A0C4;
        }
        .text-link:hover i {
            transform: translateX(4px);
        }
        .badge-soft {
            display: inline-block;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 20px;
            background: #EFF6FF;
            color: #123B6D;
            border: 1px solid #D4E4F5;
        }
        .badge-neon {
            display: inline-block;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 20px;
            background: rgba(0, 217, 255, 0.1);
            color: #0088AA;
            border: 1px solid rgba(0, 217, 255, 0.35);
        }
        .badge-hot {
            background: rgba(245, 166, 35, 0.12);
            color: #E08F0A;
            border-color: rgba(245, 166, 35, 0.3);
        }
        .card-custom {
            background: var(--card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid rgba(227, 234, 242, 0.6);
        }
        .card-custom:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .site-header {
            background: var(--primary);
            border-bottom: 1px solid transparent;
            position: relative;
            z-index: 1000;
        }
        .site-header::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }
        .site-header .navbar {
            min-height: 72px;
            padding: 0;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin: 0;
        }
        .navbar-brand:hover {
            opacity: 0.95;
        }
        .brand-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #00D9FF, #7C5CFC);
            border-radius: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            font-family: "Inter", sans-serif;
            box-shadow: 0 2px 10px rgba(0, 217, 255, 0.25);
        }
        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            font-family: "Inter", "PingFang SC", sans-serif;
            line-height: 1;
        }
        .brand-sub {
            font-size: 13px;
            font-weight: 400;
            color: #A8B8D0;
            margin-left: 6px;
        }
        .navbar-nav {
            gap: 4px;
            align-items: center;
        }
        .navbar-nav .nav-link {
            font-size: 14px;
            font-weight: 500;
            color: #A8B8D0;
            padding: 8px 18px;
            border-radius: 8px;
            position: relative;
            transition: all 0.3s ease;
        }
        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--neon);
            transition: all 0.3s ease;
            border-radius: 2px;
        }
        .navbar-nav .nav-link:hover {
            color: #fff;
            background: rgba(18, 59, 109, 0.5);
        }
        .navbar-nav .nav-link:hover::after {
            width: 60%;
        }
        .navbar-nav .nav-link.active {
            color: #fff;
            background: rgba(18, 59, 109, 0.6);
        }
        .navbar-nav .nav-link.active::after {
            width: 70%;
            box-shadow: 0 2px 8px rgba(0, 217, 255, 0.5);
        }
        .btn-nav-cta {
            background: var(--cta);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 8px;
            border: none;
            margin-left: 16px;
            transition: all 0.3s ease;
            box-shadow: 0 2px 8px rgba(245, 166, 35, 0.25);
        }
        .btn-nav-cta:hover {
            background: var(--cta-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.35);
        }
        .navbar-toggler {
            border: none;
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--neon);
            outline-offset: 2px;
            border-radius: 6px;
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 217, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        /* ========== 分类页 Hero ========== */
        .page-hero {
            background: #F0F6FD;
            position: relative;
            border-top: 3px solid var(--neon);
            padding: 72px 0 56px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(11, 37, 69, 0.82);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 36px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .page-hero .page-hero-desc {
            font-size: 16px;
            color: #C7D4E6;
            max-width: 720px;
            margin-bottom: 16px;
            line-height: 1.8;
        }
        .page-hero .breadcrumb-custom {
            font-size: 13px;
            color: #8FA3BF;
        }
        .page-hero .breadcrumb-custom a {
            color: #A8B8D0;
        }
        .page-hero .breadcrumb-custom a:hover {
            color: var(--neon);
        }
        .page-hero .breadcrumb-custom span {
            color: #C7D4E6;
        }
        /* ========== 分类内容区 ========== */
        .section-category {
            padding: 80px 0;
        }
        .section-category .container {
            max-width: 1200px;
        }
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .service-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            position: relative;
            overflow: hidden;
            transition: all 0.3s ease;
            border: 1px solid rgba(227, 234, 242, 0.5);
            display: flex;
            flex-direction: column;
        }
        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--neon);
            border-radius: 3px 3px 0 0;
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.3s ease;
        }
        .service-card:hover::before {
            transform: scaleX(1);
        }
        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
        }
        .service-card .service-icon {
            width: 58px;
            height: 58px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.25);
            margin-bottom: 22px;
            font-size: 24px;
            color: #00A0C4;
        }
        .service-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 18px;
            flex-grow: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .service-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }
        .service-card .card-tags .badge-soft {
            font-size: 12px;
            padding: 3px 10px;
        }
        /* 使用场景 */
        .scenario-section {
            background: #fff;
            padding: 80px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .scenario-item {
            background: var(--bg);
            border-radius: 14px;
            padding: 30px 24px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }
        .scenario-item:hover {
            background: #F0F6FD;
            border-color: var(--neon);
            transform: translateY(-4px);
        }
        .scenario-item .scenario-icon {
            width: 52px;
            height: 52px;
            margin: 0 auto 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 217, 255, 0.12);
            border-radius: 50%;
            font-size: 22px;
            color: #0088AA;
        }
        .scenario-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .scenario-item p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        /* 流程 */
        .process-section {
            padding: 80px 0;
            background: var(--bg);
        }
        .process-steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr) auto;
            gap: 36px;
            align-items: start;
            position: relative;
            margin-bottom: 48px;
        }
        .process-step {
            position: relative;
            padding-top: 52px;
            text-align: center;
        }
        .process-step .step-num {
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            font-size: 42px;
            font-weight: 700;
            font-family: "Inter", sans-serif;
            color: rgba(0, 217, 255, 0.75);
            line-height: 1;
            text-shadow: 0 0 20px rgba(0, 217, 255, 0.2);
        }
        .process-step .step-line {
            width: 2px;
            height: 24px;
            background: linear-gradient(180deg, var(--neon), transparent);
            margin: 16px auto 20px;
            border-radius: 2px;
        }
        .process-step h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }
        .process-cta {
            display: flex;
            align-items: center;
            justify-content: flex-end;
            padding-top: 52px;
        }
        .process-cta .btn-neon {
            white-space: nowrap;
        }
        /* FAQ */
        .faq-section {
            padding: 80px 0;
            background: #fff;
        }
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--border);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .faq-item:hover {
            border-color: rgba(0, 217, 255, 0.4);
        }
        .faq-item .faq-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            transition: all 0.3s ease;
        }
        .faq-item .faq-header .faq-num {
            font-family: "Inter", sans-serif;
            font-size: 18px;
            font-weight: 700;
            color: var(--neon);
            margin-right: 16px;
            min-width: 36px;
        }
        .faq-item .faq-header .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            flex: 1;
        }
        .faq-item .faq-header .faq-arrow {
            font-size: 14px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
            width: 24px;
            text-align: center;
        }
        .faq-item .faq-body {
            display: none;
            padding: 0 24px 20px 76px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            background: #F0F5FB;
        }
        .faq-item.open .faq-body {
            display: block;
            padding-bottom: 22px;
        }
        .faq-item.open .faq-arrow {
            transform: rotate(45deg);
            color: var(--neon);
        }
        .faq-item.open .faq-header {
            background: #F0F5FB;
            border-bottom: 1px solid rgba(0, 217, 255, 0.15);
        }
        /* CTA */
        .cta-banner {
            background: var(--primary);
            border-radius: 20px;
            padding: 56px 48px;
            margin: 80px 0;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            border: 24px solid rgba(0, 217, 255, 0.12);
        }
        .cta-banner .cta-title {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }
        .cta-banner .cta-sub {
            font-size: 15px;
            color: #A8B8D0;
            position: relative;
            z-index: 1;
        }
        .cta-banner .btn-neon {
            position: relative;
            z-index: 1;
            white-space: nowrap;
            padding: 14px 36px;
        }
        /* 页脚 */
        .page-footer {
            background: var(--primary);
            padding: 64px 0 0;
            position: relative;
        }
        .page-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 48px;
        }
        .footer-brand .navbar-brand {
            margin-bottom: 20px;
        }
        .footer-desc {
            font-size: 13px;
            color: #8FA3BF;
            line-height: 1.8;
            margin-bottom: 22px;
            max-width: 280px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid #3E5878;
            color: #8FA3BF;
            font-size: 15px;
            transition: all 0.3s ease;
        }
        .footer-social a:hover {
            border-color: var(--neon);
            color: var(--neon);
            box-shadow: 0 0 12px rgba(0, 217, 255, 0.2);
        }
        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 13px;
            color: #8FA3BF;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all 0.3s ease;
        }
        .footer-links a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .footer-links a::before {
            content: '';
            width: 0;
            height: 2px;
            background: var(--neon);
            transition: all 0.3s ease;
            border-radius: 2px;
        }
        .footer-links a:hover::before {
            width: 10px;
        }
        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-contact li {
            font-size: 13px;
            color: #8FA3BF;
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }
        .footer-contact li i {
            color: var(--neon);
            font-size: 14px;
            margin-top: 3px;
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: #617896;
            margin: 0;
        }
        /* 对焦辅助 */
        a:focus-visible,
        button:focus-visible,
        .navbar-toggler:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }
        .form-control:focus {
            border-color: var(--neon);
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15);
        }
        /* 响应式 */
        @media (max-width: 991.98px) {
            .site-header .navbar {
                min-height: 60px;
            }
            .navbar-collapse {
                background: var(--primary);
                padding: 16px 24px 20px;
                border-radius: 0 0 16px 16px;
                border-bottom: 1px solid rgba(0, 217, 255, 0.3);
                box-shadow: 0 12px 30px rgba(11, 37, 69, 0.3);
            }
            .navbar-nav {
                gap: 4px;
                align-items: flex-start;
            }
            .navbar-nav .nav-link {
                padding: 10px 0;
                width: 100%;
            }
            .navbar-nav .nav-link::after {
                display: none;
            }
            .navbar-nav .nav-link.active {
                background: transparent;
                color: var(--neon);
                border-left: 3px solid var(--neon);
                padding-left: 12px;
                border-radius: 0;
            }
            .btn-nav-cta {
                margin-left: 0;
                margin-top: 16px;
                width: 100%;
                text-align: center;
            }
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: 1fr;
                gap: 28px;
                margin-bottom: 32px;
            }
            .process-cta {
                justify-content: center;
                padding-top: 0;
            }
            .process-step {
                padding-top: 44px;
            }
            .process-step .step-line {
                height: 18px;
            }
            .cta-banner {
                flex-direction: column;
                text-align: center;
                padding: 44px 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 767.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .section {
                padding: 56px 0;
            }
            .page-hero {
                padding: 48px 0 40px;
            }
            .page-hero h1 {
                font-size: 30px;
            }
            .page-hero .page-hero-desc {
                font-size: 14px;
            }
            .service-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section-title-left {
                font-size: 24px;
            }
            .process-steps {
                gap: 24px;
            }
            .cta-banner {
                margin: 56px 0;
                padding: 36px 20px;
                border-radius: 16px;
            }
            .cta-banner .cta-title {
                font-size: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .faq-item .faq-header {
                padding: 16px 18px;
            }
            .faq-item .faq-body {
                padding: 0 18px 16px 54px;
            }
            .brand-text {
                font-size: 19px;
            }
            .brand-sub {
                font-size: 12px;
            }
        }
        @media (max-width: 520px) {
            .brand-icon {
                width: 32px;
                height: 32px;
                font-size: 17px;
            }
            .brand-text {
                font-size: 17px;
            }
            .brand-sub {
                font-size: 11px;
            }
            .process-step .step-num {
                font-size: 34px;
            }
            .page-hero h1 {
                font-size: 26px;
            }
        }
        /* 图片加载失败 */
        .img-fallback {
            background: #EEF2F6;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            color: #51617A;
            min-height: 120px;
            border-radius: 12px;
        }
        img::before {
            content: '';
            display: block;
            background: #EEF2F6;
        }
        img:not([src]) {
            visibility: hidden;
        }

/* roulang page: article */
:root {
  --primary: #0B2545;
  --primary-light: #123B6D;
  --neon: #00D9FF;
  --neon-purple: #7C5CFC;
  --bg: #F4F8FC;
  --bg-light: #F0F5FB;
  --card: #FFFFFF;
  --cta: #F5A623;
  --cta-hover: #E08F0A;
  --text: #1E2A3B;
  --text-secondary: #51617A;
  --text-muted: #8FA3BF;
  --border: #E3EAF2;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 8px 30px rgba(11,37,69,0.08);
  --shadow-hover: 0 12px 36px rgba(11,37,69,0.14);
  --transition: 0.3s ease;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC","Microsoft YaHei","Source Han Sans SC","Noto Sans SC",sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: #0088AA; }
img { max-width: 100%; height: auto; }
ul, ol { margin: 0; padding: 0; }
.container { max-width: 1200px; padding-left: 24px; padding-right: 24px; }

/* ===== Header / Nav ===== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 1030;
  box-shadow: 0 4px 20px rgba(11,37,69,0.25);
}
.site-header::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(to right, rgba(0,217,255,0), var(--neon), rgba(0,217,255,0));
  pointer-events: none;
}
.site-header .navbar {
  min-height: 72px;
  padding: 0;
}
.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 !important;
}
.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--neon);
  color: var(--primary);
  border-radius: 8px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 0 12px rgba(0,217,255,0.35);
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.3px;
  line-height: 1.2;
}
.brand-sub {
  font-size: 13px;
  font-weight: 400;
  color: var(--text-muted);
  margin-left: 6px;
}
.navbar-dark .navbar-nav .nav-link {
  color: #A8B8D0;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 16px;
  position: relative;
  border-radius: 0;
  transition: color 0.2s ease;
}
.navbar-dark .navbar-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: -2px;
  height: 2px;
  background: var(--neon);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}
.navbar-dark .navbar-nav .nav-link:hover {
  color: #fff;
}
.navbar-dark .navbar-nav .nav-link:hover::after {
  transform: scaleX(1);
}
.navbar-dark .navbar-nav .nav-link.active {
  color: #fff;
  font-weight: 600;
}
.navbar-dark .navbar-nav .nav-link.active::after {
  transform: scaleX(1);
  box-shadow: 0 2px 8px rgba(0,217,255,0.5);
}
.btn-nav-cta {
  background: var(--cta);
  color: #fff !important;
  font-size: 14px;
  font-weight: 600;
  padding: 8px 20px;
  border-radius: var(--radius-sm);
  margin-left: 16px;
  border: none;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn-nav-cta:hover {
  background: var(--cta-hover) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(245,166,35,0.35);
}
.navbar-toggler {
  border: none;
  padding: 6px 10px;
}
.navbar-toggler:focus {
  box-shadow: 0 0 0 3px rgba(0,217,255,0.25);
}
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='%2300D9FF' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ===== Article Page ===== */
.article-page {
  padding: 48px 0 80px;
  min-height: 70vh;
}
.article-layout {
  align-items: flex-start;
}
.article-main {
  padding-right: 16px;
}
.article-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px;
  margin-bottom: 32px;
}
.article-breadcrumb {
  margin-bottom: 24px;
}
.article-breadcrumb .breadcrumb {
  margin-bottom: 0;
  font-size: 13px;
  flex-wrap: nowrap;
}
.article-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--text-muted);
  padding: 0 6px;
}
.article-breadcrumb .breadcrumb-item a {
  color: var(--text-secondary);
}
.article-breadcrumb .breadcrumb-item a:hover {
  color: var(--neon);
}
.article-breadcrumb .breadcrumb-item.active {
  color: var(--text-secondary);
  max-width: 280px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.35;
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 13px;
  color: var(--text-secondary);
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 32px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-item i {
  color: var(--neon);
  font-size: 13px;
}
.meta-item a {
  color: var(--text-secondary);
  font-weight: 500;
}
.meta-item a:hover {
  color: var(--neon);
}
.article-content {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
}
.article-content p {
  margin-bottom: 1.5em;
}
.article-content h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin-top: 2em;
  margin-bottom: 1em;
  padding-left: 16px;
  border-left: 4px solid var(--neon);
  border-radius: 2px;
  line-height: 1.4;
}
.article-content h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 1.8em;
  margin-bottom: 0.8em;
}
.article-content h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 1.5em;
  margin-bottom: 0.6em;
}
.article-content img {
  width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 1.5em 0;
}
.article-content blockquote {
  border-left: 4px solid var(--neon);
  background: #F8FAFC;
  padding: 16px 20px;
  border-radius: 0 8px 8px 0;
  margin: 1.5em 0;
  color: var(--text-secondary);
  font-size: 15px;
}
.article-content a {
  color: #0088AA;
  text-decoration: underline;
}
.article-content a:hover {
  color: var(--neon);
}
.article-content ul,
.article-content ol {
  padding-left: 1.5em;
  margin-bottom: 1.5em;
}
.article-content li {
  margin-bottom: 0.5em;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 14px;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}
.article-content table th {
  background: var(--bg);
  font-weight: 600;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.tag-item {
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 13px;
  padding: 4px 14px;
  border-radius: 20px;
  transition: var(--transition);
  display: inline-block;
}
.tag-item:hover {
  border-color: var(--neon);
  color: var(--neon);
}
.article-pager {
  display: flex;
  gap: 16px;
  margin-top: 32px;
}
.pager-link {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.pager-link:hover {
  border-color: var(--neon);
  background: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.pager-link.pager-next {
  text-align: right;
  align-items: flex-end;
}
.pager-label {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}
.pager-link.pager-next .pager-label {
  justify-content: flex-end;
}
.pager-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: block;
  max-width: 100%;
}

/* ===== Not Found ===== */
.not-found-card {
  text-align: center;
  padding: 80px 40px;
}
.not-found-icon {
  font-size: 48px;
  color: var(--neon);
  margin-bottom: 16px;
}
.not-found-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 12px;
}
.not-found-text {
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.btn-primary-custom {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  border: none;
  transition: all 0.3s ease;
}
.btn-primary-custom:hover {
  background: var(--primary-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(11,37,69,0.3);
}

/* ===== Related ===== */
.related-section {
  margin-top: 8px;
}
.section-heading {
  margin-bottom: 24px;
}
.section-heading h2 {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-heading h2::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--neon);
  border-radius: 2px;
  display: inline-block;
}
.related-grid > div {
  margin-bottom: 24px;
}
.related-card {
  display: block;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 100%;
  border: 1px solid rgba(227,234,242,0.5);
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(0,217,255,0.3);
}
.related-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  display: block;
}
.related-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.5;
  padding: 16px 16px 8px;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.3s;
}
.related-card:hover h3 {
  color: #0088AA;
}
.related-date {
  font-size: 13px;
  color: var(--text-secondary);
  padding: 0 16px 16px;
  display: block;
}
.offset-card {
  position: relative;
  top: -12px;
}
@media (max-width: 767px) {
  .offset-card {
    top: 0;
  }
}

/* ===== Sidebar ===== */
.article-sidebar {
  position: sticky;
  top: 96px;
}
.sidebar-card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.title-bar {
  width: 4px;
  height: 20px;
  background: var(--neon);
  border-radius: 2px;
  display: inline-block;
}
.sidebar-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  gap: 10px;
}
.sidebar-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.sidebar-list a {
  color: var(--text);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
.sidebar-list a i {
  color: var(--neon);
  font-size: 12px;
  flex-shrink: 0;
}
.sidebar-list a:hover {
  color: var(--neon);
}
.sidebar-list .list-date {
  font-size: 13px;
  color: var(--text-secondary);
  flex-shrink: 0;
}
.sidebar-cats {
  list-style: none;
  margin: 0;
  padding: 0;
}
.sidebar-cats li {
  margin-bottom: 8px;
}
.sidebar-cats li:last-child {
  margin-bottom: 0;
}
.sidebar-cats a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 14px;
  transition: var(--transition);
  background: var(--bg);
}
.sidebar-cats a:hover {
  background: var(--bg-light);
  color: var(--primary);
  transform: translateX(4px);
}
.sidebar-cats li.active a {
  background: var(--primary);
  color: #fff;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(11,37,69,0.2);
}
.sidebar-cats li.active a i {
  color: var(--neon);
}
.sidebar-ad {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 220px;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  border: 1px solid var(--border);
}
.sidebar-ad::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11,37,69,0.75);
}
.ad-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 20px;
  text-align: center;
  z-index: 1;
}
.ad-label {
  background: var(--cta);
  color: #fff;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 12px;
  font-weight: 600;
}
.ad-overlay p {
  font-size: 14px;
  color: #fff;
  margin: 0;
}
.btn-ad {
  display: inline-block;
  background: var(--neon);
  color: var(--primary) !important;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 6px;
  margin-top: 4px;
  transition: all 0.3s;
}
.btn-ad:hover {
  background: #fff;
  transform: translateY(-2px);
}

/* ===== CTA Banner ===== */
.article-cta {
  padding: 0 0 80px;
}
.cta-banner {
  background: var(--primary);
  border-radius: 20px;
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(11,37,69,0.25);
}
.cta-banner::before {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(0,217,255,0.12);
  bottom: -60px;
  left: -40px;
  pointer-events: none;
}
.cta-banner::after {
  content: '';
  position: absolute;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  border: 2px solid rgba(124,92,252,0.3);
  top: -30px;
  right: 60px;
  pointer-events: none;
}
.cta-content {
  position: relative;
  z-index: 1;
}
.cta-content h2 {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.cta-content p {
  font-size: 15px;
  color: #A8B8D0;
  margin: 0;
}
.btn-cta {
  display: inline-block;
  background: var(--cta);
  color: #fff !important;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  position: relative;
  z-index: 1;
  flex-shrink: 0;
  border: none;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(245,166,35,0.3);
}
.btn-cta:hover {
  background: var(--cta-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(245,166,35,0.45);
}

/* ===== Footer ===== */
.page-footer {
  background: var(--primary);
  position: relative;
}
.page-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, rgba(0,217,255,0), var(--neon), rgba(0,217,255,0));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 64px 0 48px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}
.footer-brand .navbar-brand {
  padding: 0;
}
.footer-desc {
  font-size: 13px;
  color: #8FA3BF;
  line-height: 1.7;
  margin: 0;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border: 1px solid #3E5878;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #8FA3BF;
  font-size: 14px;
  transition: var(--transition);
}
.footer-social a:hover {
  border-color: var(--neon);
  color: var(--neon);
  transform: translateY(-2px);
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  font-size: 13px;
  color: #8FA3BF;
  transition: all 0.3s ease;
  display: inline-block;
  padding-left: 0;
}
.footer-links a:hover {
  color: #fff;
  padding-left: 8px;
  border-left: 2px solid var(--neon);
}
.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
}
.footer-contact li {
  font-size: 13px;
  color: #8FA3BF;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-contact li i {
  color: var(--neon);
  width: 16px;
  text-align: center;
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: #617896;
  margin: 0;
}

/* ===== Focus / Accessibility ===== */
a:focus-visible,
button:focus-visible,
.btn:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}
.btn:focus,
.btn:active:focus {
  box-shadow: 0 0 0 3px rgba(0,217,255,0.25);
}

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .site-header .navbar {
    min-height: 60px;
  }
  .navbar-collapse {
    background: var(--primary);
    padding: 16px 0;
    border-radius: 0 0 12px 12px;
    border-bottom: 1px solid rgba(0,217,255,0.3);
  }
  .navbar-dark .navbar-nav .nav-link {
    padding: 10px 16px;
  }
  .navbar-dark .navbar-nav .nav-link::after {
    display: none;
  }
  .btn-nav-cta {
    margin: 12px 0 0 16px;
    display: inline-block;
  }
  .article-sidebar {
    position: static;
    margin-top: 40px;
  }
  .article-main {
    padding-right: 12px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .article-page {
    padding: 32px 0 48px;
  }
  .article-card {
    padding: 24px 20px;
    border-radius: 12px;
  }
  .article-title {
    font-size: 24px;
  }
  .article-meta {
    gap: 12px;
    flex-direction: column;
    align-items: flex-start;
  }
  .article-content {
    font-size: 15px;
  }
  .article-content h2 {
    font-size: 21px;
  }
  .article-content h3 {
    font-size: 18px;
  }
  .article-pager {
    flex-direction: column;
  }
  .pager-link.pager-next {
    text-align: left;
    align-items: flex-start;
  }
  .pager-link.pager-next .pager-label {
    justify-content: flex-start;
  }
  .related-section {
    margin-top: 0;
  }
  .related-grid {
    margin: 0 -8px;
  }
  .related-grid > div {
    padding: 0 8px;
    margin-bottom: 16px;
  }
  .cta-banner {
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 28px;
    gap: 20px;
  }
  .btn-cta {
    width: 100%;
    text-align: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 48px 0 32px;
  }
  .footer-bottom p {
    font-size: 12px;
  }
}
@media (max-width: 520px) {
  .brand-text {
    font-size: 18px;
  }
  .brand-sub {
    font-size: 12px;
  }
  .brand-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }
  .article-card {
    padding: 20px 16px;
  }
  .related-grid > div {
    width: 100%;
    flex: 0 0 100%;
    max-width: 100%;
  }
}

/* roulang page: category2 */
/* ========== Design Variables ========== */
        :root {
            --primary: #0B2545;
            --primary-light: #123B6D;
            --accent: #00D9FF;
            --accent-soft: rgba(0, 217, 255, 0.12);
            --accent-purple: #7C5CFC;
            --bg: #F4F8FC;
            --card-bg: #FFFFFF;
            --cta: #F5A623;
            --cta-hover: #E08F0A;
            --text-main: #1E2A3B;
            --text-secondary: #51617A;
            --text-light: #8FA3BF;
            --border: #E3EAF2;
            --dark-border: rgba(255, 255, 255, 0.08);
            --success: #10B981;
            --error: #E5484D;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 8px 30px rgba(11, 37, 69, 0.08);
            --shadow-hover: 0 12px 36px rgba(11, 37, 69, 0.14);
            --transition: 0.3s ease;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "DIN Alternate", "Roboto", sans-serif;
        }

        /* ========== Reset & Base ========== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background-color: var(--bg);
            color: var(--text-main);
            line-height: 1.75;
            font-size: 15px;
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
        }

        a {
            color: var(--text-main);
            text-decoration: none;
            transition: color var(--transition);
        }

        a:hover {
            color: var(--accent);
        }

        button,
        input {
            font-family: inherit;
        }

        ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: 96px 0;
        }

        .section-sm {
            padding: 64px 0;
        }

        .section-title-wrap {
            margin-bottom: 48px;
        }

        .section-title-wrap.center {
            text-align: center;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 12px;
            position: relative;
            padding-left: 20px;
        }

        .section-title::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            width: 4px;
            height: 28px;
            background: var(--accent);
            border-radius: 3px;
        }

        .section-title.center {
            padding-left: 0;
        }

        .section-title.center::before {
            display: none;
        }

        .section-subtitle {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 640px;
            line-height: 1.75;
        }

        .section-subtitle.center {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== Buttons ========== */
        .btn {
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            transition: all var(--transition);
            border: none;
        }

        .btn-cta {
            background: var(--cta);
            color: #fff;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
        }

        .btn-cta:hover {
            background: var(--cta-hover);
            color: #fff;
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.35);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #fff;
        }

        .btn-outline-light:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 217, 255, 0.05);
        }

        .btn-outline-dark {
            background: transparent;
            border: 1px solid #C5D3E3;
            color: var(--primary);
        }

        .btn-outline-dark:hover {
            border-color: var(--accent);
            color: #0088AA;
            background: rgba(0, 217, 255, 0.04);
        }

        .btn:focus,
        .btn:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            box-shadow: none;
        }

        .btn-nav-cta {
            background: var(--cta);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            margin-left: 20px;
            transition: all var(--transition);
        }

        .btn-nav-cta:hover {
            background: var(--cta-hover);
            color: #fff;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
        }

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .site-header .navbar {
            background: var(--primary);
            min-height: 72px;
            padding-top: 0;
            padding-bottom: 0;
            border-bottom: 1px solid transparent;
            position: relative;
        }

        .site-header .navbar::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 0;
            margin: 0;
        }

        .brand-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--accent);
            color: var(--primary);
            font-size: 22px;
            font-weight: 800;
            border-radius: 10px;
            font-family: var(--font-num);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            line-height: 1.2;
        }

        .brand-sub {
            display: block;
            font-size: 12px;
            font-weight: 400;
            color: rgba(255, 255, 255, 0.75);
            letter-spacing: 1.5px;
        }

        .navbar-nav .nav-link {
            color: #A8B8D0;
            font-size: 14px;
            font-weight: 500;
            padding: 24px 16px;
            position: relative;
            transition: color var(--transition);
        }

        .navbar-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 16px;
            right: 16px;
            height: 2px;
            background: var(--accent);
            transform: scaleX(0);
            transform-origin: center;
            transition: transform 0.2s ease;
            border-radius: 2px;
        }

        .navbar-nav .nav-link:hover {
            color: #fff;
        }

        .navbar-nav .nav-link:hover::after {
            transform: scaleX(1);
        }

        .navbar-nav .nav-link.active {
            color: #fff;
        }

        .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
            box-shadow: 0 2px 8px rgba(0, 217, 255, 0.5);
        }

        .navbar-toggler {
            border: none;
            padding: 4px;
        }

        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300D9FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ========== Hero ========== */
        .category-hero {
            background: #F0F6FD;
            border-top: 3px solid var(--accent);
            padding: 64px 0 56px;
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
        }

        .category-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: rgba(240, 246, 253, 0.88);
        }

        .category-hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .category-hero .hero-desc {
            font-size: 15px;
            color: var(--text-secondary);
            max-width: 720px;
            margin: 0 auto 20px;
            line-height: 1.8;
        }

        .breadcrumb {
            justify-content: center;
            background: transparent;
            margin-bottom: 0;
            padding: 0;
        }

        .breadcrumb-item,
        .breadcrumb-item a {
            font-size: 13px;
            color: var(--text-secondary);
        }

        .breadcrumb-item.active {
            color: var(--primary);
        }

        .breadcrumb-item + .breadcrumb-item::before {
            content: "/";
            color: #94A8BF;
        }

        /* ========== Feature Cards ========== */
        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 32px 28px;
            height: 100%;
            transition: all var(--transition);
            border-top: 3px solid transparent;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent);
            transform: scaleX(0);
            transition: transform var(--transition);
            border-radius: 3px;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .feature-card:hover::before {
            transform: scaleX(1);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: 14px;
            background: var(--accent-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 24px;
            color: var(--primary);
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 0;
        }

        /* ========== Scenarios Section ========== */
        .scenarios-section {
            background: var(--card-bg);
        }

        .scenario-item {
            display: flex;
            gap: 16px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }

        .scenario-item:last-child {
            border-bottom: none;
        }

        .scenario-item .sc-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: var(--accent-soft);
            color: var(--primary);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .scenario-item h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 4px;
        }

        .scenario-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .scenario-img-wrap {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            height: 100%;
            min-height: 320px;
        }

        .scenario-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: var(--radius);
        }

        /* ========== Process Section ========== */
        .process-section {
            background: var(--primary);
            padding: 96px 0;
            position: relative;
        }

        .process-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }

        .process-section .section-title {
            color: #fff;
        }

        .process-section .section-title::before {
            background: var(--accent);
        }

        .process-section .section-subtitle {
            color: #A8B8D0;
        }

        .process-step {
            text-align: center;
            padding: 32px 24px;
            position: relative;
        }

        .process-step .step-num {
            font-family: var(--font-num);
            font-size: 48px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 20px;
            display: block;
            font-variant-numeric: tabular-nums;
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }

        .process-step p {
            font-size: 14px;
            color: #A8B8D0;
            line-height: 1.75;
            margin-bottom: 0;
        }

        .process-step .step-line {
            border-top: 2px dashed #334B6E;
            position: absolute;
            top: 64px;
            left: 60%;
            width: 80%;
            z-index: 0;
        }

        .process-cta {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 32px 0;
        }

        @media (max-width: 991.98px) {
            .process-step .step-line {
                display: none;
            }
        }

        /* ========== Content Category Cards ========== */
        .content-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            height: 100%;
            transition: all var(--transition);
        }

        .content-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .content-card .card-img {
            overflow: hidden;
            position: relative;
        }

        .content-card .card-img img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.3s ease;
        }

        .content-card:hover .card-img img {
            transform: scale(1.03);
        }

        .content-card .card-body {
            padding: 24px;
        }

        .content-card .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 3px 12px;
            border-radius: 20px;
            margin-bottom: 12px;
        }

        .content-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }

        .card-link i {
            transition: transform var(--transition);
        }

        .card-link:hover {
            color: #0088AA;
        }

        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--card-bg);
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition);
        }

        .faq-item:hover {
            border-color: var(--accent);
        }

        .faq-item .faq-question {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 20px 24px;
            cursor: pointer;
            background: transparent;
            transition: background var(--transition);
        }

        .faq-item .faq-qnum {
            font-family: var(--font-num);
            font-size: 16px;
            font-weight: 700;
            color: var(--accent);
            font-variant-numeric: tabular-nums;
            min-width: 32px;
        }

        .faq-item .faq-qtext {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            flex: 1;
            line-height: 1.4;
        }

        .faq-item .faq-arrow {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--primary);
            transition: all var(--transition);
            flex-shrink: 0;
        }

        .faq-item .faq-arrow i {
            transition: transform var(--transition);
        }

        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            padding: 0 24px;
            transition: max-height 0.3s ease, padding 0.3s ease;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        .faq-item.active {
            background: #F0F5FB;
            border-color: var(--accent);
        }

        .faq-item.active .faq-arrow {
            background: var(--accent);
            color: #fff;
        }

        .faq-item.active .faq-arrow i {
            transform: rotate(45deg);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 24px;
        }

        /* ========== CTA Banner ========== */
        .cta-banner {
            background: var(--primary);
            border-radius: 20px;
            padding: 48px;
            position: relative;
            overflow: hidden;
            color: #fff;
        }

        .cta-banner::before {
            content: "";
            position: absolute;
            bottom: -30px;
            left: -30px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(0, 217, 255, 0.15);
        }

        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta-banner p {
            font-size: 15px;
            color: #A8B8D0;
            margin-bottom: 24px;
            max-width: 480px;
        }

        .cta-banner .btn-cta {
            position: relative;
            z-index: 1;
        }

        /* ========== Footer ========== */
        .page-footer {
            background: var(--primary);
            padding: 64px 0 0;
            position: relative;
        }

        .page-footer::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .navbar-brand {
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 13px;
            color: var(--footer-text);
            line-height: 1.75;
            margin-bottom: 20px;
            max-width: 260px;
        }

        .footer-social {
            display: flex;
            gap: 12px;
        }

        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border: 1px solid #3E5878;
            border-radius: 50%;
            color: #8FA3BF;
            font-size: 16px;
            transition: all var(--transition);
        }

        .footer-social a:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 217, 255, 0.05);
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 20px;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 13px;
            color: var(--footer-text);
            transition: all var(--transition);
            position: relative;
            padding-left: 0;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 8px;
        }

        .footer-links a:hover::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 2px;
            height: 12px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-contact li {
            font-size: 13px;
            color: var(--footer-text);
            margin-bottom: 12px;
            display: flex;
            align-items: flex-start;
            gap: 10px;
            line-height: 1.6;
        }

        .footer-contact li i {
            color: var(--accent);
            font-size: 14px;
            margin-top: 3px;
        }

        .footer-bottom {
            border-top: 1px solid var(--dark-border);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #617896;
            margin: 0;
        }

        /* ========== Reveal Animation ========== */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1199.98px) {
            .section {
                padding: 72px 0;
            }

            .process-section {
                padding: 72px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: var(--primary);
                padding: 16px 0;
                border-bottom: 1px solid var(--accent);
            }

            .navbar-nav .nav-link {
                padding: 14px 20px;
            }

            .navbar-nav .nav-link::after {
                bottom: auto;
                top: 50%;
                left: 0;
                right: auto;
                width: 2px;
                height: 0;
                transform: translateY(-50%);
            }

            .navbar-nav .nav-link:hover {
                padding-left: 26px;
            }

            .btn-nav-cta {
                margin-left: 20px;
                margin-top: 8px;
                display: inline-block;
            }

            .section-title {
                font-size: 28px;
            }

            .category-hero {
                padding: 48px 0 40px;
            }

            .category-hero h1 {
                font-size: 28px;
            }

            .process-step {
                margin-bottom: 24px;
            }

            .process-cta {
                padding-top: 8px;
            }

            .cta-banner {
                padding: 36px;
            }
        }

        @media (max-width: 767.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section {
                padding: 56px 0;
            }

            .section-title {
                font-size: 24px;
            }

            .section-title-wrap {
                margin-bottom: 32px;
            }

            .category-hero {
                padding: 40px 0 32px;
            }

            .category-hero h1 {
                font-size: 24px;
            }

            .feature-card {
                padding: 24px 20px;
            }

            .scenario-img-wrap {
                min-height: 220px;
                margin-top: 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .cta-banner {
                padding: 28px 20px;
                text-align: center;
            }

            .cta-banner h2 {
                font-size: 22px;
            }

            .cta-banner p {
                max-width: 100%;
            }

            .btn-cta {
                width: 100%;
            }

            .btn-nav-cta {
                width: auto;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0B2545;
            --primary-light: #123B6D;
            --neon: #00D9FF;
            --neon-aux: #7C5CFC;
            --bg: #F4F8FC;
            --card-bg: #FFFFFF;
            --cta: #F5A623;
            --cta-hover: #E08F0A;
            --text: #1E2A3B;
            --text-secondary: #51617A;
            --border: #E3EAF2;
            --success: #10B981;
            --error: #E5484D;
            --radius: 16px;
            --radius-sm: 8px;
            --shadow: 0 8px 30px rgba(11,37,69,0.08);
            --shadow-hover: 0 12px 36px rgba(11,37,69,0.14);
            --container-w: 1200px;
            --space-section: 96px;
            --space-section-mobile: 56px;
            --font-cn: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans SC", sans-serif;
            --font-num: "Inter", "DIN Alternate", "Roboto", sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-cn);
            background: var(--bg);
            color: var(--text);
            font-size: 15px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .2s ease;
        }

        a:hover {
            color: #00A0C4;
        }

        .container {
            max-width: var(--container-w);
            padding-left: 24px;
            padding-right: 24px;
        }

        .section {
            padding: var(--space-section) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
            padding-left: 16px;
            border-left: 3px solid var(--neon);
            border-radius: 3px;
            line-height: 1.3;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: var(--primary);
            border-bottom: 1px solid rgba(0, 217, 255, 0.35);
            height: 72px;
            box-shadow: 0 4px 20px rgba(11, 37, 69, 0.25);
        }

        .site-header::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 1px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }

        .navbar {
            height: 72px;
            padding: 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
            margin: 0;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            background: var(--neon);
            color: var(--primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 22px;
            font-weight: 800;
            box-shadow: 0 0 14px rgba(0, 217, 255, 0.45);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            font-family: var(--font-num);
            letter-spacing: 0.5px;
            line-height: 1.1;
        }

        .brand-sub {
            font-size: 13px;
            font-weight: 400;
            color: #A8B8D0;
            margin-left: 6px;
            letter-spacing: 1px;
        }

        .navbar-nav {
            gap: 4px;
        }

        .nav-link {
            position: relative;
            color: #A8B8D0 !important;
            font-size: 14px;
            font-weight: 500;
            padding: 10px 16px !important;
            transition: color .2s ease;
        }

        .nav-link::after {
            content: '';
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--neon);
            border-radius: 2px;
            transform: scaleX(0);
            transition: transform .25s ease;
        }

        .nav-link:hover {
            color: #fff !important;
        }

        .nav-link:hover::after {
            transform: scaleX(1);
        }

        .nav-link.active {
            color: #fff !important;
        }

        .nav-link.active::after {
            transform: scaleX(1);
            box-shadow: 0 2px 8px rgba(0, 217, 255, 0.5);
        }

        .btn-nav-cta {
            background: var(--cta);
            color: #fff !important;
            font-size: 14px;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            border: none;
            margin-left: 16px;
            transition: background .25s ease, box-shadow .25s ease, transform .15s ease;
            box-shadow: 0 2px 10px rgba(245, 166, 35, 0.3);
        }

        .btn-nav-cta:hover {
            background: var(--cta-hover);
            box-shadow: 0 4px 20px rgba(245, 166, 35, 0.4);
            transform: translateY(-1px);
        }

        .navbar-toggler {
            border: 1px solid rgba(0, 217, 255, 0.4);
            padding: 4px 10px;
            border-radius: 8px;
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.25);
        }

        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 217, 255, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== Category Hero ===== */
        .category-hero {
            background: #F0F6FD;
            border-top: 3px solid var(--neon);
            padding: 140px 0 64px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: -120px;
            width: 360px;
            height: 360px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.07) 0%, rgba(0, 217, 255, 0) 70%);
            pointer-events: none;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -80px;
            left: -100px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(124, 92, 252, 0.06) 0%, rgba(124, 92, 252, 0) 70%);
            pointer-events: none;
        }

        .category-hero .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 217, 255, 0.12);
            color: #0088AA;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 30px;
            margin-bottom: 16px;
            border: 1px solid rgba(0, 217, 255, 0.25);
        }

        .category-hero h1 {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 20px;
            line-height: 1.7;
        }

        .breadcrumb-nav {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-secondary);
            transition: color .2s;
        }

        .breadcrumb-nav a:hover {
            color: #0088AA;
        }

        .breadcrumb-nav .separator {
            color: #B0C0D4;
        }

        .breadcrumb-nav .current {
            color: var(--primary);
            font-weight: 600;
        }

        /* ===== Feature Cards ===== */
        .features-section {
            background: #fff;
        }

        .feature-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 36px 28px;
            height: 100%;
            box-shadow: none;
            transition: box-shadow .3s ease, transform .3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--neon);
            border-radius: 3px;
            transform: scaleX(0);
            transition: transform .35s ease;
            transform-origin: left;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .feature-card:hover::before {
            transform: scaleX(1);
        }

        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 14px;
            background: rgba(0, 217, 255, 0.08);
            border: 1px solid rgba(0, 217, 255, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--neon);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== News Card Grid ===== */
        .news-section {
            background: var(--bg);
        }

        .news-card {
            background: var(--card-bg);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: box-shadow .3s ease, transform .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
            border: 1px solid transparent;
        }

        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .card-img-wrap {
            position: relative;
            overflow: hidden;
            border-radius: 12px;
            margin: 12px;
            aspect-ratio: 16 / 9;
            background: #EEF2F6;
        }

        .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .news-card:hover .card-img-wrap img {
            transform: scale(1.03);
        }

        .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(11, 37, 69, 0.82);
            color: #fff;
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 20px;
            backdrop-filter: blur(4px);
            letter-spacing: 0.5px;
            z-index: 2;
        }

        .card-content {
            padding: 8px 20px 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 52px;
        }

        .card-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 14px;
        }

        .meta-date {
            font-size: 13px;
            color: var(--text-secondary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-date i {
            color: var(--neon);
            font-size: 13px;
        }

        .meta-cat {
            font-size: 12px;
            font-weight: 500;
            color: #0088AA;
            background: rgba(0, 217, 255, 0.08);
            padding: 3px 10px;
            border-radius: 20px;
            border: 1px solid rgba(0, 217, 255, 0.18);
        }

        /* ===== Process Section ===== */
        .process-section {
            background: #fff;
        }

        .process-steps {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 32px;
            position: relative;
        }

        .process-step {
            position: relative;
            text-align: left;
            padding: 32px 24px;
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: box-shadow .3s ease, transform .3s ease;
        }

        .process-step:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .step-num {
            font-family: var(--font-num);
            font-size: 48px;
            font-weight: 700;
            color: var(--neon);
            line-height: 1;
            margin-bottom: 16px;
            display: block;
        }

        .step-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .step-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .step-line {
            position: absolute;
            top: 50%;
            right: -48px;
            width: 32px;
            border-top: 2px dashed #CBD5E1;
            z-index: 1;
        }

        .process-step:last-child .step-line {
            display: none;
        }

        /* ===== CTA Banner ===== */
        .cta-section {
            background: var(--bg);
        }

        .cta-banner {
            background: var(--primary);
            border-radius: 20px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: 0 16px 48px rgba(11, 37, 69, 0.25);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            bottom: -60px;
            left: -60px;
            width: 180px;
            height: 180px;
            border-radius: 50%;
            border: 28px solid rgba(0, 217, 255, 0.12);
            pointer-events: none;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(0, 217, 255, 0.08) 0%, rgba(0, 217, 255, 0) 70%);
            pointer-events: none;
        }

        .cta-banner h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
        }

        .cta-banner p {
            font-size: 15px;
            color: #A8B8D0;
            margin-bottom: 28px;
            position: relative;
            z-index: 2;
        }

        .btn-cta {
            background: var(--cta);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            border: none;
            transition: background .25s ease, box-shadow .25s ease, transform .15s ease;
            box-shadow: 0 4px 16px rgba(245, 166, 35, 0.3);
            position: relative;
            z-index: 2;
        }

        .btn-cta:hover {
            background: var(--cta-hover);
            color: #fff;
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.4);
            transform: translateY(-2px);
        }

        .btn-cta:active {
            transform: translateY(0);
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            background: #fff;
        }

        .faq-panel {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            border: 1px solid var(--border) !important;
            border-radius: 12px !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--card-bg);
            transition: box-shadow .3s ease;
        }

        .accordion-item:last-child {
            margin-bottom: 0;
        }

        .accordion-item:hover {
            box-shadow: 0 4px 16px rgba(11, 37, 69, 0.06);
        }

        .accordion-button {
            background: var(--card-bg) !important;
            color: var(--primary) !important;
            font-size: 16px;
            font-weight: 600;
            padding: 22px 24px;
            border: none !important;
            box-shadow: none !important;
            border-radius: 12px !important;
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.15) !important;
            outline: none;
        }

        .accordion-button:not(.collapsed) {
            background: #F0F5FB !important;
            border-bottom: 1px solid var(--border) !important;
            border-radius: 12px 12px 0 0 !important;
        }

        .accordion-button::after {
            content: '+';
            background-image: none !important;
            width: 24px;
            height: 24px;
            font-size: 22px;
            font-weight: 300;
            font-family: var(--font-num);
            color: var(--neon);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform .3s ease;
            flex-shrink: 0;
            line-height: 1;
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
        }

        .faq-num {
            font-family: var(--font-num);
            font-size: 14px;
            font-weight: 700;
            color: var(--neon);
            background: rgba(0, 217, 255, 0.08);
            border-radius: 8px;
            padding: 4px 8px;
            flex-shrink: 0;
            min-width: 36px;
            text-align: center;
        }

        .accordion-body {
            padding: 20px 24px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.75;
            background: #F0F5FB;
            border-radius: 0 0 12px 12px;
        }

        /* ===== Footer ===== */
        .page-footer {
            background: var(--primary);
            margin-top: 0;
            padding: 64px 0 0;
            position: relative;
        }

        .page-footer::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, rgba(0, 217, 255, 0), #00D9FF, rgba(0, 217, 255, 0));
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand .navbar-brand {
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 13px;
            color: #8FA3BF;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 300px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid #3E5878;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #8FA3BF;
            font-size: 14px;
            transition: border-color .25s ease, color .25s ease, background .25s ease;
        }

        .footer-social a:hover {
            border-color: var(--neon);
            color: var(--neon);
            background: rgba(0, 217, 255, 0.06);
        }

        .footer-title {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: 0.5px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            font-size: 13px;
            color: #8FA3BF;
            transition: color .2s ease, padding-left .2s ease;
            display: inline-block;
            position: relative;
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 10px;
        }

        .footer-links a:hover::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 2px;
            height: 12px;
            background: var(--neon);
            border-radius: 2px;
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-contact li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 13px;
            color: #8FA3BF;
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .footer-contact li i {
            color: var(--neon);
            margin-top: 3px;
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 13px;
            color: #617896;
            margin: 0;
        }

        /* ===== Focus Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--neon);
            outline-offset: 2px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 991.98px) {
            .site-header,
            .navbar {
                height: 60px;
            }

            .navbar-nav {
                padding: 16px 0;
            }

            .nav-link {
                font-size: 15px;
                padding: 14px 16px !important;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            }

            .nav-link::after {
                display: none;
            }

            .nav-link.active {
                color: var(--neon) !important;
                background: rgba(0, 217, 255, 0.06);
                border-radius: 8px;
            }

            .btn-nav-cta {
                margin: 16px 0 8px;
                width: 100%;
                text-align: center;
            }

            .navbar-collapse {
                background: var(--primary);
                border-bottom: 1px solid var(--neon);
                box-shadow: 0 16px 32px rgba(11, 37, 69, 0.35);
            }

            .process-steps {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .step-line {
                display: none;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 767.98px) {
            :root {
                --space-section: var(--space-section-mobile);
            }

            .category-hero {
                padding: 110px 0 48px;
            }

            .category-hero h1 {
                font-size: 30px;
            }

            .category-hero .hero-desc {
                font-size: 15px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .cta-banner {
                padding: 40px 24px;
                border-radius: 16px;
            }

            .cta-banner h2 {
                font-size: 22px;
            }

            .btn-cta {
                width: 100%;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-desc {
                max-width: 100%;
            }
        }

        @media (max-width: 575.98px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }

            .section-header {
                margin-bottom: 32px;
            }

            .card-content {
                padding: 8px 16px 20px;
            }
        }